Business:Online Payment expert

I need some expert help with credit card processing integration. My payment
gateway just wrote a new Business:Online Payment module, and now I need
someone to install and test it.  I am hoping that this can be done by the
end of the day Monday, for a Tuesday launch...  
 
Please contact me directly with a time estimate & quote. If you are not a
frequent poster to the developers mailing list...please provide a list of
sites in which you have utilized the Business:Online Payment module, and
also list some relevant references.
 
Thanks in advance,

C-